.header{
     width: 100%;
}
.nav{
    width: 1170px;
    min-width: 1170px;
    height: 90px;
    margin: 0 auto;
    line-height: 90px;
}
.fl{
    float: left;
}
.fr{
    float: right;
}
.plate-ul .plate-ul-li{
    float: left;
    margin-left: 40px;
}
.plate-ul .plate-ul-li a{
     display: block;
}
.plate-ul .plate-ul-li a:hover{
    color: var(--themecolor);
}
